I have a 90 chevy 4x4 1500 with a front end rattle. Only noticable going down very bumpy roads. It sounds like a shock would sound pounding against the inner fender. 3 alignment shops have checked the front end and can't find the rattle. Everything seems tight. They think it could be play in the left axle shaft. Is it supposed to have end to end play?

 

Your CV joint could be shot... How do the boots look?
I'm not to familiar with IFS 4wd.

 

What about the stabiliser bar bushing? Doesn't take muck loose to make noise...

 

brake pads rattling? or shock bolts. they may seem tight, but if the shock has room to move around it could rattle